Given the equation:
hcl(g) + h2o(> x(aq) + )
which ion is represented by x?
(1) hydroxide (3) hypochlorite
(2) hydronium (4) perchlorate

The correct answer is Option 2.

Explanation:

For the given options:

Option 1: Hydroxide ion

The chemical formula for this ion is

Option 2: Hydronium ion

The chemical formula for this ion is

Option 3: Hypochlorite ion

The chemical formula for this ion is

Option 4: Perchlorate ion

The chemical formula for this ion is

For the given chemical reaction:

The ion represented by X is hydronium ion.

Hence, the correct answer is Option 2.

c- cold periods in earth's history during which glaciers covered much of the surface.

explanation: